#include <stdio.h>
#if 0
// 真零
int   0;
float 0.0;
*      NULL     标识未初始化的指针，代表内存的零地址
char   '\0'     标识字符串结束标志

// 假零
char  '0';
"0"    '0'+'\0' 2 Byte

#endif
int main()
{
    printf("int %d\n", 0);
    printf("float %f\n", 0.0);
    printf("'0' = %d  %c \n", '0', '0');
    printf("NULL = %p  NULL = %d\n", NULL, NULL);
    printf(" '\\0' = %d  '\\0' = %c-\n", '\0', '\0');
    return 0;
}
